These lenses are traditionally manufactured in a soft contact lens and at Ali’s Eye Care Clinic there are certain tests we use to evaluate if the X chrome lens is suitable for the patient.Ĭontact lenses are a good option for many individuals such as a natural field of view patient with active lifestyle and compared to spectacles generally offer better sight. This allows the patient to compare different contrasts between the two eyes. X Chrome Contact Lens is a red contact lens worn in one eye and is used to overcome red-green colour vision deficiencies. Soft lenses are also available with a brown iris and colour correction pupil, with or without power. The lenses are available either of PMMA material or of high water (75%) soft lens material. During the initial stages of wear, until adaptation has taken place, there may be some disorientation of depth judgment, which should be pointed out to patients for reasons of safety.Ĭiuffreda reported in 1980 on the Pulfrich effect elicited when subjects first wore the lens in one eye, being equivalent to the effect of a 0.57 neutral density filter or 27% light transmission. It takes some time to adapt to the situation but it is reported as being very successful. Generally recognized as the X-Chrome lens (a brand name given to the lens), gives rise to a different perception, during binocular viewing, of hues, altering their saturation or brightness, or imparting a luster, and the wearer learns to relate that appearance to a particular colour. (also called as Dyslexia lenses or X Chrome lenses)Ī red contact lens, of peak transmission 595 nm, or a green contact lens worn in one eye only (monocular use) was recommended by La Bissoniere, as long ago as 1974, in an attempt to overcome certain red-green colour deficiencies and enhance colour discrimination, by allowing a comparison of the different contrasts then perceived by the two eyes.
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